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Accompanied by his American backer, David Innes (Doug McClure), Victorian inventor Abner Perry (Peter Cushing) gave a shakedown test to his marvelous earth-boring craft. Unfortunately, the ship punched through to the world's center, where they stumbled upon a culture of humans in thrall to a race of prehistoric bird creatures. Effects-filled take on the Edgar Rice Burroughs tale co-stars Caroline Munro, Cy Grant, Godfrey James. 89 min. Widescreen; Soundtrack: English; audio commentary; featurettes; theatrical trailer.

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Accompanied by his American backer, David Innes (Doug McClure), Victorian inventor Abner Perry (Peter Cushing) gave a shakedown test to his marvelous earth-boring craft. Unfortunately, the ship punched through to the world's center, where they stumbled upon a culture of humans in thrall to a race of prehistoric bird creatures. Effects-filled take on the Edgar Rice Burroughs tale co-stars Caroline Munro, Cy Grant, Godfrey James. 89 min. Widescreen; Soundtrack: English; audio commentary; featurettes; theatrical trailer.